^-i JOHS. HOYi: l'KI KMSKN 



i(iini/X(i lii.s/HU- ;iiul C. Xtirnclidiiii Uislinc-l. In •^rowtlis of Ihcse planls I 

 liiive oltcii loiind it \cr\ (liHicnill lo ascertnin wlu'tiier or nol pyronoid 

 was present, and ane -;il,s tlu' iinpression llial llu- pyrcnoid iiuiy lie 

 entirely abseiil. c. o. in yoiiiij« cclls, cvfn il il is (piiti' plainly present 

 in idder cflls of Ihe same species. Henrc I Ihink lluil one should not 

 alhu-li loo iniieh iniporlanre lo Ihls eharacler. 



I'uyrnaly (1. c.i would idenlily Clocoiijstis resien losa Na«{. whith is 

 tlie ty|)e of Ihc {^cniis willi Coccomi/xa Xmu/cliana (Art. Wille. I beeause, 

 aeeordin«^ to Na-^clis own statement, it has becn found {^rowin-,' on 

 damp i)cams and stoncs, 2 becaii.se he Ihinks lic can dcmontrate from 

 Ihc liuurcs (Nageli 184i) Taf. IV F' thai the cells do nol mulliply bv 

 simple cell division in Ihree dircclions but by aulospore formation, if 

 Ihese consideralions arc correct, since slralilied and >einf,'esehachteltent 

 gelalinoiis sliealhs are not unknown in the true Coccomtixa sjjccies 

 KC.Corbiciri \\\\h' liHO. p. ;!()2 . it is no longer possible to lind any 

 decisive (lillerence betwecn Ihe two genera, Piiymalys explanation 

 does not, however, seem to mc (piite convincing. If il is really Coc- 

 comijxa NuvncliaiHi Naegeli has dcscribed, it is incomprehensible That he 

 shonld have drawn only round cells. the great majorily of the cells in 

 this species being oblong or fiisiform, neither does Puymaly's assertion 

 thai reprodiiclion in G. nesiculosa is an aulospore formation seem tome 

 convincing. Xo original specimen of Xageli's plant being probably in 

 cxistence, il will be im|)<)ssible lo get to the bollom of the matter, hence 

 I am of opinion thai we must for the present mainlain the generic 

 name Coccomuxa for the following more closely investigaled species: 

 C. Xacucliana Art.) Wille. C. dispar Schmidle, C.Corbicrei Wille. C. lillo- 

 ralis Hansg. Wille, C. nalans Chod.) Schmidle. Common to all Ihcse 

 species are Ihe oflen oblong cells. though spherical cells mav quite 

 occasionally be found. Possibly there exist true Gloeocystis species with 

 a stratilicd gelafinous sheath and simple cell-division in three directions 

 in accord wilh Nag el i s diagnosis. To these pcrhaps belong e. g. C o//- 

 tmccanoye P. 1914, p. 324; and Gloecustis (/igas Kiitz.j Lagerh. 



Print/, is cvidenlly of the .same opinion, for in Engler et Pranti, 

 Die naiurlichen Pllanzenfamilien 2. Ann. he refers the two genera to 

 dillerent families, viz. Gluconjslis to Tctrasporaccæ and Coccomi/xa to 

 PU'urococcaceæ. 



Coccomyxa dispap Schmidle. Schmidle 1001, j) 20 Tab. I l\o ()-'?.5 

 Boye Petersen 1915 p. ;{2;i. " 



S. Icel. 270. 



The species was originally found by Schmidle on mosses in pine 

 forcsls. I myseif have observed it on very diverse substrala in Denmark, 

 Ihus on mosses in bogs, on rocks, stumps of trees, bark, and soil. In 

 Iccland I founrl it on a paling in Reykjavik. 



Apatococcus lobatus Chod, H.,yc P. n comb. Pleurococcus lobatus 

 (Jiodat 1902, P.2H4. lig. 199 Hove P, 191.-,, p.321,Tab.I lig 5-10 

 Pleuraslrum lobalum Priniz 1921. p. 21, PI. VI. lig. 150-200, Apatococcus 

 vulgaris Hrand 1925, p. 348, lig. io_;-,3. 



S I.el. 270, 280. 



